possible UTF-8 buglet

I'm seeing a little bit of weird behaviour in the Tamil lanaguage.
Check out the subject line on the message page, which is fine. Versus
the same subject line on the index page, which is rendering
incorrectly due to a UTF-8 character being split by whitespace. (This
is the lastest message from 2009/03/21). Basically, we get different
results between $SUBJECTNA$ and $SUBJECT$, with the former being
correct. The more-or-less raw message can be obtained from the
Pipermail archive, or I can supply it.

http://www.mail-archive.com/ubuntu-l10n-tam(_at_)lists(_dot_)ubuntu(_dot_)com/msg00617.html
http://www.mail-archive.com/ubuntu-l10n-tam(_at_)lists(_dot_)ubuntu(_dot_)com/maillist.html
https://lists.ubuntu.com/archives/ubuntu-l10n-tam/

<TextEncode>
utf-8; MHonArc::UTF8::to_utf8; MHonArc/UTF8.pm
</TextEncode>

<LiTemplate>
<li>
<span class="date">$YYYYMMDD$</span>
<span class="subject">$SUBJECT$</span>
<span class="sender">$FROMNAME$</span>
</LiTemplate>

<SubjectHeader>
                <div class="msgHead">
                        <h1><span class="subject">$SUBJECTNA:200$</span></h1>
                        <p><span class="sender">$FROMNAME:200$</span><br>
                        <span class="date">$DATE:200$</span></p>
                </div>
</SubjectHeader>


# perl -v
This is perl, v5.8.8 built for x86_64-linux-gnu-thread-multi

# mhonarc -v
  MHonArc v2.6.16+ (Perl 5.008008 linux)